1000+ DC Circuits MCQ Questions and Answers Pdf - 1

Question: 1

When a number of resistances are connected in parallel, the total resistance is

(A) greater than the smallest resistance

(B) less than the smallest resistance

(C) between the smallest and greatest resistance

(D) none of the above

Question: 2

The electrons in the last orbit of an atom are called

(A) thermionic electrons

(B) valence electrons

(C) bound electrons

(D) free electrons

Question: 3

E.M.F. in a circuit

(A) maintains potential difference

(B) decreases circuit resistance

(C) increases circuit resistance

(D) none of the above

Question: 4

The electric current in a discharge tune containing a gas is due to

(A) negative and positive ions both

(B) electrons and positive ions both

(C) positive ions only

(D) electrons only

Question: 5

Constantan wire is used for making standard resistance because it has

(A) low specific resistance

(B) high melting point

(C) high specific resistance

(D) negligibly small temperature coefficient of resistance